Performance – IT Blog

PCI Express ASPM

ASPM (Active-State Power Management) is used to manage the power consumption of PCI Express buses, even if the PCIe device is in use and may affect the device’s response delay.

Changing gc_thresh on Linux

In this article I will give an example of changing gc_thresh on Linux, this parameter usually needs to be increased on highly loaded access servers.

How to convert MySQL tables from MyISAM to InnoDB

Since InnoDB is more reliable for storing important data and is more efficient with frequent write requests, I will convert MyISAM tables to InnoDB, in old databases, in one of the companies.

Boost UDP Transaction Performance

File Format: PDF

File size: 3 Mb

Author: Toshiaki Makita
NTT Open Source Software Center

Installing Memcached

Let me give you an example of installing Memcached, which allows you to cache data in RAM.

Installing and updating the ixgbe driver

I will give an example of installing or updating ixgbe drivers on Linux.

Monitoring Combined Network Interface Channels in Zabbix

I decided to add to Zabbix a check of the number of Combined channels of network interfaces, since when loading the server there could be different situations when my scripts changing their number were not always executed or were executed, but the value was reset during the system startup.

Distribution of network card interrupts across processor cores

I will give an example of the distribution of interrupt network interfaces on the processor cores.
For example, I’ll take a server with accel-ppp, 6Gb/s traffic, 500K + pps, nat with ipoe and 6000 dchp clients.
Also, be sure to disable hyper-threading in the BIOS, since load balancing on virtual cores can greatly increase the load on some physical cores.

Cisco 6509e Net Input CPU Load

Once on a single Cisco 6509e switch configured as L3 and with a standard CPU load of 10%, the load suddenly increased to 40%.

How to catch flood on Huawei MA5600

Once, on the port of one of the L3 switches of the Cisco 6509e, to which the Huawei MA5683T was connected, I saw that Multicast traffic increased very much, while the CPU load of the switch processor increased by 30%.